Column bar spacer



March 4 1924.

0. W. PEDERSON COLUMN BAR SPACER Filed May 26, 1922 Oscar WPeaZeraam WM Patented Mar 4, 1192 3..

, rattan Parana OSCAR W. PEDERSON, OF CHICAGO, ILLINOIS.

COLUMN BAR SPACER.

Application filed May 26,

T 0 all whom it may concern Be it known that I, Qsoan W. Pnnnnson, a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Column Bar Spacers, of which the following is a specification.

This invention relates to that class of metallic reinforce for concrete columns in which an open spiral wire and a cluster of rods having longitudinal association with said spiral, constitute the reinforcing core for the column, and the present improvement has for its object To provide a structural formation and combination of parts, whereby the above mentioned open wire spiral and longitudinal rods are connected together in proper relation in a convenient, efi'ective and rapid manner, all as will hereinafter more fully appear.

In the accompanying drawings Fig. 1, is a perspective view illustrating the general arrangement of parts in the present improvement.

Fig. 2, is a horizontal section of the same.

Fig. 3, is a vertical section of same on line 3-3, Fig. 2.

Fig. 1-, is a detail perspective'view illustrating one form of the holding portion of the spacing band.

Figs. 5 and 6 are detail perspective views showing different forms of attaching means for the bridge or tie strips of the spacing band loops.

Like reference numerals indicate like parts in the several views.

Referring to the drawings, 3 designates a spiral member of rod or wire, the coils of which are held in open and spaced relation by being wired or otherwise secured to a plurality of spacer strips 2, to constitute in connection with a cluster of rods 2, extending longitudinally of the spiral member, a generally used type of skeleton reinforce or core for concrete columns.

In connection with such type of reinforce or core, the present improvement involves a spacer band of plate metal formed as follows 1 designates the spacer band above referred to, and comprising a strip of metal having a length aproximating the circumference of the spiral member 3, arranged to encircle a spiral convolution of said spiral 1922. Serial N0. 563,947.

member and having attachment thereto in the manner hereinafter set forth. In the present construction the spacer band lis formed with a series of return bends or loops 1 arranged in spaced relation corresponding with the spacings required in a cluster of the reinforcing rods 2 aforesaid. The desired spacing of the rods 2 is attained by the endwise insertion thereof intov the aligned loops 1 of a series of spacing bands arranged at intervals on the skeleton structure.

4 designates tie or bridge strips spanning the open portion of the loops or bends 1' and attached at their respective ends to the spacing band 1 in any usual manner, with said strips adapted to hold the bends or loops 1 in shape against spreading strains. Any usual fastening means may be employed to attach the strips' l to the band 1, and various means are shown in the drawings.

In Fig. 2 the tie or bridge strip 4 is shown as a separate part, with its respective ends provided with attaching tongues 5 and 6 adapted for entrythrough orifices'formed therefor in the spacing band 1, and for subsequent clinching in place.

In Figs. 4 and 5 the tie or bridge strip 4 is shown as an integral part of the spacer band 1, with one end made free and formed with an attaching tongue, similar to an aforesaid tongue 5 or 6, and fastened to the spacing band 1v in alike manner.

In Fig. 6 the tie or bridge strip 4 is shown as integrally connected at both ends with spacer band 1 and is formed with corrugations or folds 4:, by which its original length is reduced to a size corresponding with the gap or opening of an aforesaid bend or loop 1' in a spacing band.

In the preferred construction of the spacing band 1, shown in difi'erent views, the loops or bends 1 are of a twin type in separated relation, and are formed by a plurality of longitudinal slits in the metal of the spacing band. Such slits provide a pair of marginal portions which are shaped to form the twin loops or bends above referral to, while the central portion formed by said slits is used to form the tie or bridge strip 4 of the present improvement.

With the present construction, the assembly of the skeleton reinforce core is efieoted by placing at intervals a series of spacing bands 1 around individual convolutions of the spiral rod formation 3 with the series of WlIl I P s raddling the rod material Spa of the convolutions and projecting into the interior of the spiral formation 3 to receive and hold the longitudinal rods 2 in proper spaced relation. The present improvement is more especially applicable to building columns of the larger type, and the assembly of a reinforce core therefor, is effected on the ground by the application of the spacer bars 13 to the convolutions of the spiral rod formation 3 to properly space said convolutions, the spacing'ba'nds l of the present improvement are then applied, after which two or more of longitudinal rods 2 are inserted endwise into the proper loops 1 of the bands 3 and'inside the spiral rod formation 1. The skeleton core, so far assembled, is hoisted from the ground and lowered into and properly positioned in the column mold, after which the remaining rods '2 are inserted in place, in the proper loops 1' of the spacing bands 1.

It is within the scope of the present invention to make the spacing band 1 of a single strip of metal, in which the required number of bends or loops 1' are formed in spaced relation, and with the respective ends of the strip provided with attaching tongues 7 for engagement with an adjacent portion of the wire spiral of the structure. Or, when so required, the spacing band may be formed in sections, adapted to be connected togetherend to end, by interengaging slot and tongueformations or other usual and suitable tie connections.

Having this fully described'my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination'with a concrete column'reinforce composed of aspiral rod formation and a plurality of rods 1 arranged longitudinally in the interior thereof, of a spacing band adapted to'encircle and have peripheral engagement with a convolution of said spiral formation and spacing engagement with the plurality of longitudinal rods assen aforesaid by means of a plurality of loops in the length of the spacing band.

2. The combination with a concrete column reinforce composed of a spiral rod formation and a plurality of rods arranged longitudinally in the interior thereof, of a spacing band adapted to encircle and have peripheral engagement with a convolution of said spiral formation and spacing engagement with the plurality of longitudinal'rods aforesaid by means of a plurality of loops in the length of the spacing band, each of said loops projecting wholly from one face of the spacing band with their gaps spanned by tie strips.

3. The combination with a concrete column reinforce composed of a spiral rod formation and a plurality of rods arranged longitudinally in the interior thereof, of a spacing band adapted to encircle and have peripheral engagement with a convolution of said spiral formation and spacing engagement with the plurality of longitudinal rods. aforesaid by means of a plurality of twin loops in the length of the spacing band.

4:. The combination with a concrete column reinforce composed of a spiral rod formation and a plurality of rods arranged longitudinally in the interior thereof, of a spacing band adapted to encircle and have peripheral engagement with a convolution of said spiral formation and spacing engagement with the plurality of longitudinal rods aforesaid by means of a plurality of twin loops in the length of the spacing band, said twin loops projecting wholly from one face of the spacing band with their gaps spanned by tie strips.

Signed at Chicago, Illinois, the eighth day of May, 1922.

OSCAR W. PEDERSON. 

